I have gone from a skeptical person of all the "skip music theory cheating apps" to finding Scaler makes me a better musician. Main use is to see what chord I am playing and make sure it actually is an 11th with a 5b. I also like lining up my chord progressions and then playing around with different fill chords. Sure I do 90% of my playing by well playing, but when I am digging in with Scaler I am expanding what I am playing on the keyboard due to Scaler.
Also makes it super easy to build chords in a DAW quickly. I record 2 tracks with one being the raw MIDI from my controller and the 2nd track is Scaler playing chords to the track. Remind me when I would record bass direct and re-map the bass into an amp later.